Sharpfning machine



Feb. 17. 1925. y 1,526,549

J. R JACKSON SHARPVENING MACHINE Filed Sept, 1, 1921 15 Sheets-Sheet 1 fi INVENTOR. WWW/555 JOHN E. JAC/(IO/V 1 7.1925. 1,526,549 J. R. JACKSON SHARPENING MACHINE Filed Sept. 1, 1921 3 Sheets-Sheet 2 INVENTOR.

JOHN IZJHC/(SON BY ov/MT A TTORNEYS.

Feb. 17. 1925. 1,52 ,549

.J. R. JACKSON SHARPENING MACHINE Filed Sept. 1, 1921 3 Sheets-Sheet '5 O O O O A \9 I\ N t {g m m Q I INVENTOR WWW A ATTORNEY Patented Feb. 17, 1925.

PATENT OFFICE.

JOHN R. JACKSON, or sen reancrsco, cannon-1am.

SHARBENING MACHINE.

Application filed September T0 alt whom it may concern:

Be 1t known that I, JOHN R. JACKSON,

a citizen of the United States of America,

and a resident of the city and county of San Francisco, and State of California, have invented a new and useful Sharpening Machine, of which the following is a specification.

My invention relates to sharpening machines and especially to machines for sharpening safety razor blades.

One of the objects of the invention is the provision of improved means for sharpening safety razor blades, capable of operation at high speed on a continuous succession of blades fed to it. Subsidiary objects include the provision of improved means for holding the blades while being sharpened, improved means for receiving the blades in orderly arrangement from the holding means, and improved means for mounting the sharpening rolls.

My invention possesses many other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description. It is to be understood that I do not limit myself to the showing made by the said, description, as I may adopt variant forms of my invention as set forth in the claims.

Referring to the drawings, Fig. 1 isan elevation of my sharpening machine, portions being broken away to disclose. better the structure. Fig. 2 is a vertical sectional view thru the machine, the plane of section being indicated by the line 22 of Fig. 1. Fig. 3 is an end elevation of the machine takenfrom the View point of the arrow 3 of Fig. 1. Figs. 4 and 5 are plan and elevation respectively of elements on the conveyor mechanism. Fig. 6 is a vertical sectional view thru the receptacle for receiving the sharpened blades. Fig. 7 is an end elevation taken from the View point of arrow 7 in Fig. 1. Fig. 8 is a side elevation of the guide frame on which the carrier belts are mounted.

In general terms the -device of my invention comprises a pair of parallel endless belts comprising a conveyor and each belt provided with resilient jaws. The belts are so arranged that the lower reach of the upper belt is adjacent the upperreach of the lower belt and on movement of the belts the jaws come into opposition, and cooperative relation. Means are provided for guiding Serial No. 497,528.

the insertion of blades to be sharpened between the jaws as they come together at one end of the machine. As the blades are carried along by the carrier belt, sharpening rolls are vertically oscillated to alternately engage the blade from above and below, and by the time a blade has travelled the length of the sharpening roll it is in the desired condition. As the jaws separate at the discharge end of the machine, the blades are release-d and fall in orderly arrangement into a receptacle slowly revolving in time with the movement of the conveyor. Means are provided for driving the carrier belts in synchronism and for oscillating the sharpening rolls. Preferably the machine is made double, that is, with jaws projecting from both sides of the carrier belts, and with two sets of sharpening rolls so that the operation may feed blades into the machine with both hands.

More particularly my device comprises a main frame 2 including the table top 3 upon which rests the upper portion 4 of the main frame. Mounted in the frame 4 upon the brackets 6 extended inwardly from the frame is the two-part guide frame on which the upper carrier belt runs. The guide frame consists of two side plates 7. one of which is shown in elevation in Fig. 8, connected by cross rods 8 at each end. Adjacent the end of the frame on each side. a rod 9 is fixed in the bracket (3. and engages slidably in the boss 11 formed on the frame plates 7 A spring 12, the tension of which may be adjusted by a nut threaded on the rod, tends to push the frame downwardly. A similar guide frame formed of plates 13 is similarly mounted below the guide frame 7 and is resiliently thrust upwardly by the springs 14- surrounding rods fixed in the bracket 15. On the guide frames are disposed the carrier belts comprising the conveyor, a cross section thru one reach of which is shown in Fig. 5. Each of the carrier belts consists of two endless leather belts 16 arranged side by side. Resilient cross members 17 are secured to the leather belts and are formed at their ends to provide jaws 18, and in their centers between the belts are formed to provide teeth 19 adapted to engage with the driving screw 20, which is journalled in the main frame 4 and lies between the adjacent reaches of the carrier belt as shown best in Fig". 2. Rotation of the driving screw moves the belts in per fect synchronism. The proportion of parts is such that on the adjacent reaches of the carrier belt the jaws 18 are in opposition,

'A plate 21 superposed upon the cross member 1'? and ofsiinilar shape gives add-ed strength to the teeth 19 and resilience to the jaws 18. A fabric liner 22 is preferably secured to the inside faceof the jaws to facilitate a firmer grip on the blades, and this may conveniently be caught around the leather belts16 between the cross members and the metallic shoes 23 which face the inner edges of the leather belts. The drive screw 20 isdriven by the chain 24 from the shaft 25 which receives its motion thru gears 26 driven thru the worm gearing 27 from the main shaft 28 connected to motor 29 by a suitable belt.

Means are provided for guiding the inscrtion of blades into the conveyor. Fixed to one of the carrier frames and slidably connected to the other one is a plate 31 lined on the inside with any suitable material, such as leather 82, and so placed that if a razor blade is placed against the lining and pushed into the closing aws of the conveyor. the blade will be held in the desired position for sharpening. One of these guide plates is placed on each side of the machine as shown in Fig. 7, and the operator, after alittle practice, finds no difliculty in feeding wit-h both hands, a continuous succession of blades into the closing jaws of the, conveyor properly placing each blade. At the other end, (right of Fig. 1) is ,provided means for receiving the blades from the opening jaws of the conveyer after they have been sharpened.

ldotatably mounted in. the bracket 33 is a conically formed receptacle 84,, shown in section in Fig. 6, and lined with soft material,

such as plush, 35. The receptacle is releasably held upon a disk 36 engaged by the friction wheel 37 which is adjustably arranged on the shaft 38 and driven by the worm wheel 39. The worm wheel is. fixed on the shaft 40 and is driven by belt from the screw are deposited in orderly arrangementv on the sides of the receptacles. Correct timing of the receptacle speed is secured by axial adjustment of the friction wheel 37. The depth to which the blades slide into the receptacle is controlled by the stop plate 4-2, which may be omitted for long blades.

Pivoted on the main frame at each end of the machine at the upper and lower portions thereof are levers 4;?) and 4a pivotally connected by links 45 onone side and links 46 on the opposite side. The lower levers l4.- are rigidly connected by the rod 47, and a connecting rod 48 pivoted to this red at one end and at the'other terminating in an eccentric strap surrounding the eccentricjiil on the shaft 25 provides means for oscilliiting the levers 43 and 4A with their connecting links 4-5 and 4:6. Journalled in the links 45 on one side and the links 46 on the opposite side are sharpening rolls 51. and 52 respectively. The proportion of parts is such that with razor blade held in the jaws 18, oscillation of the levers 4:4 alternately engages the sharpening rolls with the blades. The lower roll rises and engages the lower side of the blade, and as it falls the upper roll engages the upper side of the blade.

This oscillatioi'i of the sharpening rolls is timed with the rate of progress of the blade thru the conveyor so that the blade is thoroughly sharpened bythe time it reaches the end of the roll and. is discharged from the layer. It is of course obvious that the succession of blades on the opposite side of the machine are being similarly treated by the rolls 52. The rolls are so constructedas to provide a ho-ning surface with which the blades first come into contact. This is followed by a stropping surface which puts a finishing touch to the honed edgeand the diameter of the stropping surface is less toward the end so that a lighter stropping is effected, thus producing a perfect edge.

The rolls are rotated at high speed by belt connection with pulleys 53 and 54 mounted on shafts 56 and 57 respectively. These shafts are driven by suitable belt connection as shown from the main shaft 28. Although theoretically the oscillating frame in which the sharpeningrolls are mounted should oscillate about the same as the axis of the driving pulleys on the shaft 28, no practical disadvantage is found in pivoting. the levers 44 a short distance to one side of the axis of the driving pulleys as shown in Fig. 2.

' Pulleys and belts similar to those just described, drive the honing and stropping rolls 52. In order to provide supports for the lower reach of the lower CA-ll81' belt I arrange a longitudinally extending rod 58 'of room for a back if there is one.

vent lateral displacement of the carrier belt on the upper portion of the upper guide frame. The shoes 23 take the rubbing it any occurs. A plate 61 connecting the upper portions of the main frame and overlying the tie rod 62, provides a mounting for a name plate and also acts to protect from injury the upper reach of the upper carrier belt. I

Operation.The operator is stationed at the end of the machine seen at the left of Fig. 1, and feeds with both hands a succession of blades into the conveyor positioning the blades by means of the guide plates 31. As the jaws 18 close upon the blade it is securely held whether a Hat blade or a blade having a back, since the shape of the jaws, as shown in Fig. 2 and Fig. 5, allows plenty The jaws clamp the thin portion of the blade in position to be engaged by the oscillating sharpening rolls, which first hone and then strop the blade, as it is carried by the conveyor along the length of the rolls. As the jaws separate at the right of the machine as seen in Fig. 1) the blades are released and slide down into the receptacle 34 which is rotating at such a speed that each blade is deposited a trifle behind the preceding one, so that the delicate edges are protected. After a batch of blades have been run thru the machine or the container has been filled, it is taken oil the driving spindle and a new one substituted. The filled container is then taken to the opposite side of the machine and the blades fed thru the machine once more to sharpen the opposite edges.

I claim:

1. A blade sharpening machine comprising sharpening means, a pair of carrier belts for moving a succession of said blades into engagement with said sh arpening means, means for retaining said blades on said belts while engaged with said sharpening means, and a rotating receptacle "for receiving the sharpened blades from said belts in orderly arrangement.

2. A blade sharpening machine compris ing sharpening means, a pair of carrier belts vfor moving a succession of said blades into engagement with said sharpening means, means for retaining said blades on said belts while engaged with said sharpening means, a rotating receptacle For receiving the sharpened blades from said belts in orderly lapping relation, means for rotating said receptacle in time with the movement of said belts, said last named means being adjustable to vary the speed of the receptacle relative to that of the belts.

3. A blade sharpening machine comprising sharpening means, a pair of carrier bolts for moving a succession of said blades into engagement with said sharpening means, and. resilient jaws on each of said belts, jaws on one belt being opposed to jaws on the other belt to form pairs of jaws for holding the blades.

i. A blade sharpening machine comprising sharpening means, a pair of carrier belts for moving a succession of said blades into engagement with said shar 'iening means, and resilient jaws on each belt, said jaws by the movement of the belts auton'iatically pairing in opposition to retain the blades therebetween.

5. A blade sharpening machine comprising sharpening means, a pair of carrier belts, jaws on each of said belts adapted to move into cooperative relation with the jaws of the other belt with movement of the belts and for conveying a succession oi said blades into engagement with said sharpening means, and means for moving said belts in synchronism.

6. A blade sharpening machine comprising sharpening means, a pair of carrier belts, opposed jaws on said belts adapted to move into cooperative relation with move ment of the belts and for conveying a succession of said blades into engagement with said sharpening means, a screw disposed between the adjacent reaches of said belts, and means on said belts engaging said screw whereby rotation of the screw moves the belts in synchronism.

7. A blade sharpening machine comprising sharpening means, a pair of carrier belts, opposed resilient jaws on said belts adapted to move into cooperative relation with movement of the belts and for holding and conveying a succession of said blades into engagement with said sharpening means, a screw disposed between and in threaded engagement with the adjacent reaches of said belts, and means for rotating said screw.

8. A blade sharpening machine comprising a pair of spaced parallel sharpening rolls, a pair of carrier belts, opposed jaws on said belts adapted to move into cooperative relation with movement of said belts and for carrying a succession of said blades in a path adjacent both said rolls, means for moving said belts in synchronism, and means for oscillating said rolls to alternately engage opposite sides of said blades.

9. A blade sharpening machine comprising a pair of spaced parallel sharpening rolls, a pair of carrier belts, opposed jaws on said belts adapted to move into cooperative relation with movement of said belts and for carrying a succession oi said blades in a path adjacent both said rolls, a screw disposed between and in threaded engagement with the adjacent reaches of said belts, means for rotating said screw, and means for oscillating said rolls to engage alternately opposite sides of said blades.

10. A. blade sharpening machine comprising a pair of carirer belts arranged with parallel adjacent reaches, means for resiliently pressing said adjacent reaches together, jaws on said belts in opposition on said adjacent reaches for holding said blades, means for moving said belts in synchronism and means for sharpening said blades while held in said jaws.

11. A blade sharpening machine comprising a pair of carrier belts arranged with parallel adjacent reaches, means for resiliently pressing said adjacent reaches together, jaws on said belts in opposition on said adjacent reaches for holding said blades, means for moving said belts in synchronism, a sharpening roll arranged on each side of the blades in said jaws, means for oscillating said rolls to engage alternately opposite sides of said blades, and means for rotating said rolls.

12. A blade sharpening machine comprising a pair of guide frames, means for resiliently pressing said frames together, a carrier belt arranged to move about each guide frame, aws on said belts in opposition on the adjacent reaches thereof for holding said blades, means for moving said belts on said frames in synchronism, and means for sharpening said blades while held in said jaws.

13. A blade sharpening machine comprising a pair of guide frames, means for resiliently pressing said frames together, a carrier belt arranged to move about each guide frame, jaws on said belts in opposition on the adjacent reaches thereof for holding said blades, a screw disposed between and in threaded engagement with the adjacent reaches of said belts, means for rotating said screw, and means for sharpening said blades while held in said jaws.

14. A blade sharpening machine comprising a pair, of carrier belts arranged with parallel adjacent reaches, one of said adjacent reaches overhanging the other, aws on said belts in opposition on the adjacent reaches thereof for holding said blades, means for moving said belts in synchronism, means for sharpening the blades in said jaws, and means including a receptacle for receiving the sharpened blades in orderly arrangement.

15. In a sharpening machine, a pair of guide frames, a pair of carrier belts arranged with parallel adjacent reaches on said frames, transverse members disposed across each belt and forming opposed jaws at each side of the belts, and a screw in threaded engagement with said transverse members for moving the belts.

In testimony whereof, I have hereunto set my hand.

JOHN R. JACKSON. 

